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1. the color produced by the longest waves of the visible spectrum, approximately 630 to 750 nm.
2. a dye or stain with this color.
scarlet red an azo dye used as a biological stain for fats.


One of the primary colors, produced by the longest waves of the visible spectrum, with violet at the other end. For individual red dyes, see specific name.
[A.S. reád]


1. the color produced by the longest waves of the visible spectrum, approximately 630 to 750 nm.
2. a dye or stain with this color.

scarlet red  an azo dye used as a biological stain for fats.
Drug slang A regional term for, ‘under the influence of drugs, stoned’
Fringe medicine A colour believed—by the proponents of the pseudoscience of colour therapy—to increase circulation and energy, and reduce anxiety
Physics A primary colour produced by the longest waves of the visible electromagnetic spectrum from 630 to 740 nm


adj in Chinese medicine, a facial coloration indicative of hot energy, poor digestion, and possible respiratory inflammation. See also energy, hot.


One of the hues of the visible spectrum evoked by stimulation of the retina by wavelengths beyond 630 nm. The complementary colours to red are blue-green (between 490.4 and 492.4 nm).


the color at the lowest end of the visible spectrum; the color of blood.

red dye
used in food coloring, reputed to reduce fertility.

Patient discussion about red

Q. is red meat bad for you??? and what about white meat like pork??? why is consider to be healthy eating vegie what are the advantages of this kind of nutrition ? what are the actual differences in a nutrition matter ?

A. Eating red meat an average of about twice a day seems to raise the risk of stomach cancer. This risk is increased even more if the meat is barbecued and well done. there are more evidence about colon cancer , and also higher risk of strokes. but i have no idea about white meat. although barbecued meat (white or red) had a material that our liver cause it to be cancerous.

Q. Does anybody know what can be done about a very itchy red rash on ones' toes which comes back every few months I've used different sorts of creams such as Lamasil. It's really bothering me and I'd love to get a few directions before I give up and go see a doctor.

A. Sounds like 'Athletes foot'. Here is a website that lists some remedies for it:'s_Foot.cfm

Q. I have red blotches under my skin and swelling on hands and feet with joint pain. Any answers. it has been two days the blotches are gone but I still have swelling.

A. could be some kind of joint Rheumatic fever... some kind of joint infection. this should be looked upon by a Dr. those things can cause damage if not treated right. a bacterial infection that is not treated can cause a permanent damage.

More discussions about red
References in periodicals archive ?
8 min, which spectrally corresponds to the standard red dye and that from single moth (Figs.
Dismissing reports of the presence of dangerous chemicals in the red dye, Khoury cited the laboratory tests, which ruled out the presence of chemical compounds such as cyanide and chromium (VI) in the samples retrieved from the river.
If confronted by a villain, staff press a panic button, setting off a red dye that is squirted from the ceiling.
Lately, she seems to have switched to pink; perhaps she has used up the local supply of red dye.
Cochineal, a red dye that's made from the pulverized bodies of insects, has caused severe allergic reactions in some people.
The new potion combines a red dye - proven safe for people and animals but deadly to insects - with the juice from a bitter, mutant watermelon.
Herman's World of Sporting Goods, a 270-store retail chain headquartered in Carteret, New Jersey, has chosen to see red dye tags rather than red numbers in its accounts.
The technology consists of a high-adhesion toner with a hidden red dye, which is released when a solvent that will remove toner comes in contact with TROY Security Toner.
Tenders are invited for Red Dye Penetrant Kit Consisting Of Red Dye Penetrant, Remover/Cleaner And Developer In The Ratio 1:4:4 As Per Rdso Specification No.
The EarlyTox Cell Integrity Kit is based on two nuclear dyes: EarlyTox Live Red Dye is cell permeable and marks both live and dead cells, while EarlyTox Dead Green Dye is cell impermeable and stains only cells with damaged outer membranes.
Last year, Starbucks said it would stop using a red dye made of crushed bugs based on comments it received ''through a variety of means,'' including an online petition, and switch to a tomato-based extract.
During the theft the cash box's anti-theft device was activated and red dye and smoke began billowing from it.